alt.freeweights.vision / samvit_base_patch16.sa1b
From: timm <huggingface.co/timm>Newsgroups: alt.freeweights.visionSubject:

samvit_base_patch16.sa1b

Date: 2026-11-15Commit: c6db726Signed: 2DC28CC7B26A283B ✓

Image feature extraction model with 90M parameters. Safetensors weights, 717 MB in all. Published by timm under Apache-2.0.

90M params717MBsamvit_base_patch16.sa1bsafetensorspermissive
FactsParams90MSize717 MBFormatssafetensorsTaskimage feature extractionLicenseApache-2.0From sourcepermissive
$ fw get timm/samvit_base_patch16.sa1b
# manifest sha256 ab99bf1f48e8… · 717 MB · 5 files
$ fw verify ./samvit_base_patch16.sa1b timm/samvit_base_patch16.sa1b
From sourceHosted (signed)timm/samvit_base_patch16.sa1bLast check: 2026-11-15 03:24 UTC

Get help: custom fine-tune or private deploy. We review your setup before we quote.

Works with

Runs with

Ranked by fit to this model (safetensors), then by GitHub stars.

Overview

Size
717 MB
Weights
359 MB (safetensors)
Parameters
90M
Formats
safetensors
Task
image feature extraction
License
Apache-2.0 (permissive)
Files
5, each with a sha256
Publisher
timm
Added
2026-11-15
Section
alt.freeweights.vision
Lineage

Original release from the publisher.

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BadgeHostLast checkResult
From sourcehuggingface.co2026-11-15 03:24 UTCpassed

Model card

From the publisher at commit c6db726. Shown as plain text with links; images open at the publisher.

Model card for samvit_base_patch16.sa1b#

A Segment-Anything Vision Transformer (SAM ViT) image feature model (NOTE: for features and fine-tune, segmentation head not included). Pretrained on SA-1B for segementation by paper authors w/ initialization from MAE weights.

Model Details#

Model Usage#

Image Classification#
from urllib.request import urlopen
from PIL import Image
import timm

img = Image.open(urlopen(
    'https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/beignets-task-guide.png'
))

model = timm.create_model('samvit_base_patch16.sa1b', pretrained=True)
model = model.eval()

# get model specific transforms (normalization, resize)
data_config = timm.data.resolve_model_data_config(model)
transforms = timm.data.create_transform(**data_config, is_training=False)

output = model(transforms(img).unsqueeze(0))  # unsqueeze single image into batch of 1

top5_probabilities, top5_class_indices = torch.topk(output.softmax(dim=1) * 100, k=5)
Image Embeddings#
from urllib.request import urlopen
from PIL import Image
import timm

img = Image.open(urlopen(
    'https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/beignets-task-guide.png'
))

model = timm.create_model(
    'samvit_base_patch16.sa1b',
    pretrained=True,
    num_classes=0,  # remove classifier nn.Linear
)
model = model.eval()

# get model specific transforms (normalization, resize)
data_config = timm.data.resolve_model_data_config(model)
transforms = timm.data.create_transform(**data_config, is_training=False)

output = model(transforms(img).unsqueeze(0))  # output is (batch_size, num_features) shaped tensor

# or equivalently (without needing to set num_classes=0)

output = model.forward_features(transforms(img).unsqueeze(0))
# output is unpooled, a (1, 256, 64, 64) shaped tensor

output = model.forward_head(output, pre_logits=True)
# output is a (1, num_features) shaped tensor

Model Comparison#

Explore the dataset and runtime metrics of this model in timm model results.

Citation#

@article{kirillov2023segany,
  title={Segment Anything},
  author={Kirillov, Alexander and Mintun, Eric and Ravi, Nikhila and Mao, Hanzi and Rolland, Chloe and Gustafson, Laura and Xiao, Tete and Whitehead, Spencer and Berg, Alexander C. and Lo, Wan-Yen and Doll{'a}r, Piotr and Girshick, Ross},
  journal={arXiv:2304.02643},
  year={2023}
}
@article{dosovitskiy2020vit,
  title={An Image is Worth 16x16 Words: Transformers for Image Recognition at Scale},
  author={Dosovitskiy, Alexey and Beyer, Lucas and Kolesnikov, Alexander and Weissenborn, Dirk and Zhai, Xiaohua and Unterthiner, Thomas and  Dehghani, Mostafa and Minderer, Matthias and Heigold, Georg and Gelly, Sylvain and Uszkoreit, Jakob and Houlsby, Neil},
  journal={ICLR},
  year={2021}
}
@misc{rw2019timm,
  author = {Ross Wightman},
  title = {PyTorch Image Models},
  year = {2019},
  publisher = {GitHub},
  journal = {GitHub repository},
  doi = {10.5281/zenodo.4414861},
  howpublished = {\url{https://github.com/huggingface/pytorch-image-models}}
}

Files

5 files · 717 MBWeights 359 MB (safetensors). Sizes and sha256 from the signed manifest.
Hide all 5 files with their sha256
FileSizesha256
.gitattributes1.48 KBdb7c0371f46f0840b8f25794c1e3321c9b5820a8cb6ba9694a46fc64b8fae5a6
README.md3.77 KB631eb3c716b110aa8a92f03a333e16cae425ed7a73ceaad7a643e2bca947403d
config.json605 B8db9799026b90843cb44b405a889d1017430b8b52aa9f432d3943242289c9770
model.safetensors359 MB31a9f4edc394c5ae7a96045576570189a354ada86094a5842bcc9a05a8939ea2
pytorch_model.bin359 MB6070d2b98dcedcf3626ad96b3c0aef52c70842bc2498d13eaf7acd686802f1af
VersionsEach time the pinned upstream commit or file list changed in this repo. Newest first.
Upstream commitDateContents
c6db726d87 pinned now2026-11-15 03:24 UTC5 files · 717 MB

Use it

$ fw get timm/samvit_base_patch16.sa1b
# manifest sha256 ab99bf1f48e8… · 717 MB · 5 files
$ fw verify ./samvit_base_patch16.sa1b timm/samvit_base_patch16.sa1b
fw.pyChecks the signature and every sha256, tries each source in order, resumes.
$ python3 fw.py get https://freeweights.allternit.com/manifests/timm/samvit_base_patch16.sa1b.json --dir ./samvit_base_patch16.sa1b $ python3 fw.py verify ./samvit_base_patch16.sa1b ./timm__samvit_base_patch16.sa1b.json
hfThe Hugging Face CLI with one setting. Same repo id.
$ HF_ENDPOINT=https://freeweights.allternit.com hf download timm/samvit_base_patch16.sa1b --revision c6db726d87cbba7788e026776b46c5db3aa1594b --local-dir ./samvit_base_patch16.sa1b

License

Name
Apache License 2.0
Id
Apache-2.0
Class
Permissive
Redistribution
yes
Listing
Hosted (signed)
Decided
License as declared by the publisher. No person read it. 2026-11-15
Text in
README.md
Text sha256
631eb3c716b110aa8a92f03a333e16cae425ed7a73ceaad7a643e2bca947403d
Terms gate
No extra terms beyond the license.

Read the license text

Licenses are checked against the license table. A custom license passes only after a person reads it.

Provenance

From: timm <huggingface.co/timm>Newsgroups: alt.freeweights.visionSubject: samvit_base_patch16.sa1bDate: 2026-11-15Commit: c6db726Signed: 2DC28CC7B26A283B ✓
Upstream
timm/samvit_base_patch16.sa1b
Pinned commit
c6db726d87cbba7788e026776b46c5db3aa1594b
Manifest
samvit_base_patch16.sa1b.json · .minisig
Manifest sha256
ab99bf1f48e89c73998e24ba020e3d62165716b6203f5255fd2c74fdd59d1d9a
Signature
minisign, Ed25519, key 2DC28CC7B26A283B
Created
2026-11-15 03:24 UTC
Generator
freeweights-manifest/0.1.0
Takedowns
None.

How to verify

$ curl -O https://freeweights.allternit.com/manifests/timm/samvit_base_patch16.sa1b.json $ curl -O https://freeweights.allternit.com/manifests/timm/samvit_base_patch16.sa1b.json.minisig $ minisign -Vm samvit_base_patch16.sa1b.json -P RWQ7KGqyx4zCLXtUFOqvfv8L3g+8fpKJ1FsuxPyOYMF+4KufbUxKq1Oq $ shasum -a 256 <file> # compare with the Files tab

A manifest whose signature fails must be rejected. A file whose size or sha256 does not match must be discarded. Verify a download

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Get it
Download
$ HF_ENDPOINT=https://freeweights.allternit.com hf download timm/samvit_base_patch16.sa1b
Open in Freeweights Studio

Pull, verify and run it in the Allternit app on Desktop, web or phone.

Signed manifest
minisign, key 2DC28CC7B26A283B. samvit_base_patch16.sa1b.json. Provenance. Takedown history: none.
From: dima806 <huggingface.co/dima806>Subject: ai_vs_real_image_detection
From: legekka <huggingface.co/legekka>Subject: AI-Anime-Image-Detector-ViT
From: onnx-community <huggingface.co/onnx-community>Subject: AI-Anime-Image-Detector-ViT-ONNX
From: AICodexLab <huggingface.co/AICodexLab>Subject: answerdotai-ModernBERT-base-ai-detector
From: onnx-community <huggingface.co/onnx-community>Subject: answerdotai-ModernBERT-base-ai-detector-ONNX
From: onnx-community <huggingface.co/onnx-community>Subject: bart-large-cnn-ONNX